Pneumatic or steam drill.



R. C. FRASER. PNEUMATIC 0R STEAM DRILL. APPLlcATxoN FILED AuG.2o.1914.

Patented Dee. 26, 1916.

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PNEUMATIC 0R SEAM DRILL.

APPLICATION man Aua.20. 1914.

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PNEUMATIC 0R STEAM DRILL. APPLICATION FILED Aue.20. 1914.

1,210,299. Patented Dec. 26,1916.

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9X o o y0 /M 95 y ewa/w W I FmF/v @@IM 33M 21W RICHARD CLAYTON FRASER',OF CENTRAL CITY, COLOR/ADO, ASSIGNOROFONE-THIBD To w. n. FRAsnno'rDURANGO,

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Speccatonfof Letters Patent.

patented Dec. 26, 1916.

applicati@ sied august 2o, i914. serial No. 857,639.

To all 107mm yzzfmay concern.'

Be it known that; I, RICHARD C. FRASER, a citizen of the United States,residing at Central City, State, of Colorado, have inventeda new anduseful `Pneumatic or Steam Drill or Hammer; and l do hereby declare thefollowing to be a full, clear, and exact `description of the invention,such as willy enable others skilled .ini the art to which it.appertainsto malte and use the same.

This :invention relates to a pneumatic, steamy drill or hammer, fordrilling rocks `and the like. j

As one of the objects of the invention 'is the provision of an improvedyconstruction of drill including a pneumatic vor steam piston andprovided with` a rearY yieldably` mounted head,-`whioh relieves thepiston and the entire device ofthe shock and jariinci* dent to the blowofthe drill tool. n c

`The invention aims as another object to provide a piston rod ritied,sol as ,to impart a partial rotary movement to the pistonas it is`driven outwardly, there being a ratchet mechanism to prevent theretrogression of the piston in a rotary direction when' receding. In`this manner the piston receives an intermittent rotary movement. *y Y lAnother-object of the invention is the provision of a forward yieldab'lehead of the piston cylinder, acting to give or yield as the pistonrecedes ormoves forwardly,

A further object of the invention is .the`

provi-sion of means forprojecting water or the like through the piston,and into the hole which is being drilled. c c

Inpractical fields the details of construction may be subjected toalterations, falling withinithe scope of what is claimed.

The invention comprises further features and combination of parts, as.hereinafter set forth, `shown in the drawings and claimed.

In the drawings :-Figure1 is a viewin perspective `of the improveddrillmechanism constructed in accordance with the invention. View. Fig. 3`isa horizontal sectional view on line 3*;3 of Fig. `2.y Fig. tis atransverse sectional view 'on .line H of Fig. 2. Fig. 5 is alongitudinal sectional view through the steam or air chest, showing theauxiliary valve in `another position than l that -shown in Fig. 2. Fig.6 is ahorizontal sectional view through the `steam .for air chest,showing how in the county of Gril'pinandy Fig. 2 is a longitudinalvsectional,

the steamer air passes through the auxiliary valveinto the cylinder.Fig. 7 is a'detail view of the auxiliary valve. Fig. 6L is a sectionalview on line (3a-6@L of Fig. 4.' F ig. 8 is .an enlarged detailsectional yview through the parts 28, 80 and 31. y

eferring more yespecially to the drawings, may bev supported inl anysuitable manner, and is provided with an elongated trough device or`plate 2y constructed with guides 3, in which the flanges 4 of thecylinder 'are guided. Extending through the elongated trough plate, thatis, throughr theribs 7' at the: ends thereof 'are rods 8 having nuts `9at the ends 10. On the `other end portions of ythe rods tubes 11 aretelescopically `arranged, there being washers between the tubes Aand oneend of ythe elongated plate. The end portions 13 ofthe frods .f8 extendthrough the cross.4 heads lll #having nuts 15, there being washersylbetween the cross# head and the :tubes 11. Mounted in a bearing 17in thecrosshead swivelly is a rod 18 having a `thread 1,9 upon itsfend 2Obeyond the crosshead. rlhese threads 19 terminate shoulder *21, betweenwhichy and the in a crank a washer 22 is arranged. Thecrank is rotatedor threadedras shown at 23 to engage the thread 19 and is adjusted `jamagainst the washer 22. The said threads 19 extend in a directiomso thatwhen the'crank is rotated in thel proper direction to feed the cylinderforward, the tighter the crank 2a is arranged against the washer. Tofurther lock thecrank on the threaded the same is split as shownat 25,and a screw bolt'extends through the split end, and `by tightening upthe nut thereon, the split portions are ydrawn close together. The rod18 has anintegral collar L27 between whichand the washer 22 thecrosshead 14 is arranged.

A; sleeve x28 is lthreadedupon, the rod [18 asshown.y This-sleeve ismounted in a projection of the lower portion of the cylinder, therebeing lock nuts'f29and `30 on `each end of the sleeve to Ahold thesleeve yin theprojection-31.4 W'hen the rod 18 is Arotated bythe crank,kthe cylinder and its attending parts are adjusted-forwardly orrearwardly. The

1 designates a base member, ywhich end '19,

cylinder vlias theusual piston 32 mounted in its chamber 5a, providedwith ak piston red 38, `through which and the piston abore BaextendsyOne and which piston-32 is endof the cylinder has ahead 36-provided11,0

and piston,

ears 56 of the head 36. The

with a reduced portion 37 extending into the bore of the cylinder. Atube 38 having an integral collar 39 is provided. The end 40 of the tube38 beyond the collar 39 extends partially through the head and has aringed nut 41 threaded thereto, thereby holding the tube 38 in place.rlhe end portion 40 of said tube opens into an interiorly threadedcavity 49 of the head, and engagi ing the threads of said cavity is theusual plug 43. A passage 45 is formed laterallyT in the head 36, and tiis passage opens into the cavity, and one end of the passage isthreaded to receive suitable connections from a water supply (notshown). The tube 38 telescopes the bore of the piston, in such wise asto prevent the water (which passes through the tube, the piston and thepiston rod, so as to reach the bore of the drilling tool, so as to enterthe hole which is being drilled) from entering the piston chamber 5a ofthe cylinder 5. The plug 43 is utilized for the purpose of cutting off asupply of water through the tube and the piston rod which water is usedfor cooling and washing out the hole that is being drilled. By entirelyremoving the plug, and closing a valve 48 in said connections of saidpassage (Which connections are designated by the number 49) the excesswater may be removed from the passage through the tube 38, the pistonand the piston rod. rFhe other end 50 of said cylinder is provided witha dominant cylinder head 51 having a reduced portion 52, which lits theinterior oi' the end 50 of the cylinder. An auxiliary cylinder head 53is provided, and is supplied with a slight reduced extension 54, whichiits an annular recess 55 of the dominant cylinder head. The head 36,the dominant head 51 and the auxiliary head 53 are all provided withlateral projections or ears 56, through which the rods 57 extend. Theserods 57 are provided with heads 58, which engage the ends 59 of the rods57 are threaded, to receive the nuts 60, between which and the ears 56of the auxiliary head 53, coil springs 61 are interposed. ln this mannerthe heads are yieldably held in place, and are allowed to give or yieldincident to the movement of the piston, thereby slightly opening theopposite ends of the cylinder, thereby affording cushioning ports. Theopposite sides of the cylinder at each end are provided with ears 62,through which the rods 57 extend.

The piston 32 is constructed with the usual packing rings 63, and itwill be observed that the piston 32 is detachably connected to thepiston rod, by means of a plug or pin 64, threaded in place as shown. f

rlhe dominant cylinder head 51 has a cavity 65, in which a ratchetcollar 66 isarranged, the teeth of which are engaged by the springretained pawls 67 which are lof cated or mounted in recesses 68 of thehead 51. The ratchet collar upon its circular opening has oppositelyarranged lugs 68, which extend into the rifled grooves 69 of the pistonrod 33. The grooves 69 are disposed slightly spirally or at an angle tothe rod, so that when the piston is driven forwardly a partially rotarymovement is imparted thereto, but upon the rearward movement of thepiston and the red the ratchet collar slips by the spring pawls whichwill permit the piston rod to gain another position, in order toreceiveV a further partial revoluble movement, when again being drivenforward. t will be seen that by this arrangement the piston rod and thetool at its end will receive anintermittent rotary motion. rlheauxiliary cylinder head is provided with a suitable packing ring 70,held in place by a jam collar 71, which is threaded uponca reducedextension 7 2 oi' the auxiliary cylinder head, there being a springtensioned pin mounted in a cavity of the head 53, which cavity andspring tensioned pin are designated by the numerals 73 and 74. rlhepiston rod 33 is provided with an extension 35 threaded into a toolholding head 7 6, there being a set screw 77 to secure the head 76against movement. The head 76 is provided with a bore registering withthe bore in the piston rod, and this bore 7 8 of the head 76 is designedfor the reception of the drill tool 85, which is held or clamped intoposition by they tongue 80 of the clamping block 81, which is secured intransversely disposed staple 82, which extends through the head 76 andprovided with suitable nuts, by which the staple is held i'irmly in therecess 83 of the block 81. The

tongue 80 of the bloclr 81 extends in a slot 84 in the head 76 andengages a dat portion 85 or the drill tool, thereby preventing movementof the drill tool relative to the head 7 6,

Bolted upon a flat surface of the cylinder is the steam or air chestcasing 87, which is provided with an inlet port 88, into which the steamor air pipe 89 (which receives its supply 'from any suitable source, notshown) extends. rlhe port 88 opens into a chamber 90, which is incommunication with the auxiliary valve chamber 91, by virtue of theports 92 and 93. Passages 94 and 95 extend from the interior of thecylinder at each end, partially longitudinally of the cylinder andthrough the wall thereof and through the under portion of the steam orair chest and open into the auxiliary valve chamber. The portions of thepassages 94 and 95 which pass through the wall oir' the chest aredesignated byA the numerals 945L and 95a. Extending from the auxiliaryvalve chamber is a port or passage 96 between the ports 94a and 95a,which port 96 or passage passes through a portion of Lthe cylinder andhas an exhaust 'pipe or conduit 97 connected place by the c thereto.Also communicating between the interior of the cylinder 5 and theauxiliary valve chamber 91 are ports 98 and 99, which constitute meansfor the passage of air or steam from the interior of the cylinder to thechamber 91., for not only actuating the auxiliary valve 100, but forcushioning the piston.

rllie auxiliary valve 100 is cylindrical in shape, and is provided witha fiat surface 101, which is engaged by a plug which extends through theupper wall of the chest and designated by the rnumeral 102. Passages 103and 104 terminating in the ports 105, 106, 107 and 108 yextend throughthe auxiliary valve, there being additional passages 1.09 and 110communicating with said passages 108 and 104.

Supposing the valve 100 to be .in such position that the port of thepassage 1.1.0 is in communication with the port 93 of the chamber 90, inwhich case the port 107 is in communication with the port 95EL of thepassage 95, and the piston is adjacent the end 50 of the cylinder. Inthis case steam or air f1 om the chamber 90 will pass through the port93 through the passage 110, through the passage 104, down through thepassage 95, acting upon the piston in such wise as to drive the pistonrearwardly, at the same time receding the piston rod and the tool, theratchet collar slipping by the spring retained pawls, the air or steampreviously used to move the piston to a'position adjacent the end 50 ofthey cylinder exhausts upwardly through the passage 94 and the passage941 through the port 105 and passage 103 and pass out through 'the port106 through the passage 96, and finally through the exhaust pipe, whichis connected to the passage 96. As the steam or air actsupon the pistonto move it rearwardly, a small portion thereof passes up through thepassage or port 99 and acts upon the auxiliary valve 100, moving thesame suliiciently to cause the port of the passage 109 to register withthe port 92. This registration of the passage 109 and the port y92 takesplace substantially a little prior to thepiston reaching the rear end ofthe cylinder 5. However, as soon as the registration takes place, thesteam or air passes from the chamber 90 through the port 92, through theport of the passage 109, and down through the port 945L and the passage94 in the yrear of the piston, thereby acting upon the same to push itforwardly, in which case the air or steam previously used in front ofthe piston, is being exhausted through the passage 95, up through theportk 108 through the passage 104 and through the port 107 down throughthe exhaust passage 96 and exhaust pipe. In this case a portion oftheair or Copies of this patent may be obtained. for ve cents each, byaddressing the steam passes up through the port 98 and acts upon theauxiliary valve to move it back to the position previously stated, alittle before the piston reaches the forward end of the cylinder. Thesteam chest consists of two parts 112 and 11,8, bolted together and tothe cylinder by means of the bolts 114. A plug 115 is threaded to thewall of the chest, by the removal of which the chamber 90 may becleaned, or an escape of air or steam permitted, that is in case of anexcess supply. Each end of the chest is provided with threaded plugs116, topermit access to the auxiliary valve chamber.

The passages 98 and 99 extend downwardly, laterally and inclined towardeach other from the chamber 91 as shown in dotted lines in Fig. 2, andopen into the chamber of the cylinder 5. Where the Vports 98 and '99open into the chamber 5 are so spaced relative to each other asindicated at 98 in Fig. 5, so that when the piston 32 is adjacent theend50 of the cylinder', air or steam is allowed to pass into the passage98, and through the same to the valve chamber, behind one end of thevalve, in order to operate it, in such a manner as to permit steam orair to enter the chamber 5a to operate the piston. When the piston movesfrom the end 50 of the cylinder 5 to the opposite end` the piston 82uncovers the passage 99, thereby allowing exhaust steam or air to passthrough the passage 99 into the valve cham,A ber to move the valve inthe opposite direction.

The invention having been set forth, what is claimed as new and usefulis In a rock drill; thecombination of a cylinder and a piston operablein said cylinder; of a valve casing on `the cylinder, provided withbranch inlet ports; the valve casing near the center having an exhaustduct, and two passages extending to the ends of the cylinder chamber; avalve in the valve casing having' a pair of ports, each alternatelyregistering with the branchy inlet ports, and terminating in branchports registering with the exhaust and one of said passages, as one ofthe branches ofthe other valve port registers with the other passage;and means of communication connecting the end of the valve casingchamber and the cylinder chamber, whereby the motive medium behind thepiston, when it reaches one of the ends of the cylinder chamber, willenter the valve casing and operate the valve.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

RICHARD CLAYTON FRASER.

"l/Vitnesses GEORGE RAsMUssEN, JOHN PARK.

Commissioner of Patents.

Washington, E. C.

